30906005747 has 4 divisors (see below), whose sum is σ = 31029137496. Its totient is φ = 30782874000.

The previous prime is 30906005743. The next prime is 30906005749. The reversal of 30906005747 is 74750060903.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 30906005747 - 2² = 30906005743 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30906005743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61565498 + ... + 61565999.

It is an arithmetic number, because the mean of its divisors is an integer number (7757284374).

Almost surely, 2^30906005747 is an apocalyptic number.

30906005747 is a deficient number, since it is larger than the sum of its proper divisors (123131749).

30906005747 is a wasteful number, since it uses less digits than its factorization.

30906005747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123131748.

The product of its (nonzero) digits is 158760, while the sum is 41.

The spelling of 30906005747 in words is "thirty billion, nine hundred six million, five thousand, seven hundred forty-seven".